Lifting-jack.



H. W. LAMPMAN.

LIFTING JAGK.

APPLICATION FILED FEB. 2a, 1912.

Patented June 10, 1913.

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A i "is" Patented Application tiled Eeebruary S38, rem. aerial seas-n.

To all whom it may concern: 7

Be it known that I, HERMAN N. LAMP- :uzm, a citizen of the UnitedStates, residin at Lagrange in the county of Lagrange an State of in iana, have inventeda new and useful Lifting-Jack, of which the following is a specification.

This invention relates to lifting jacks and is particularly designed for use in'elevating motor vehicles and the like.

One of the objects of the invent-ion is to provide a lifting jack which is simple and durable in construction, all parts thereof being made of stock of standard or commercial forms, the said jack being compact in construction and easy to operate.

A further object is to rovide a lifting jack which can be adjusts so as to support a vehicle at a desired distance from the ground.

With the foregoing and other objects in view which will appear as the description roceeds, the invention resides'in the comination and arrangement of parts and in the details oi construction hereinafter described andclaimed, it being understood that chan es in the precise embodimentof the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

in the accompanying drawin s the preferred form of the invention has con shown.

In said drawings :Figure lis a perspective view of the jack, one of the positions or the movable parts being indicated by dotted lines. Fig. 2 is a side elevation of the structure. Fig. 3 is an enlarged front elevation of upper portion of the jack, the head being elevated. Fig. 4 is a detail view of the slide. Fig. 5 is an enlarged section on line z't-Ji Fig. 3. Fig. 6 is an enlarged section on line 0-1) Fig. 1.

Referring to the figures by characters of reference 1 designates a metal base referably formed in a temple plate having 1ts coni so as to constitute the bearing for the base of the standard of the jack. This standard is formed of a single length of channel steel or the like bent to form a straight base 2 the ends otwhich merge into upwardly converglns members 3 terminating? in upwardly extending. parallel arms 4.. .Tie channelis formed in the m-, ner races of the arms at and forms lde ways ii ,for the receptwnof a shderna e, up of a singlelength otsteel or 'the. .li lre such as shown at- 6, the said strip being: folded so as to form parallel longitudinally extending portions fitting snugly between the flanges on the arms 4 as shown in Fig. 5. The crown portion of the slide formed wher the parallel portions thereof merge, forms an enlargement 7 to which is secured a curved plate 8 forming the head of the jack. lhis head is prefers 1y connected to said enlargement by a single rivet- 9 and it will be apparent, therefore, that the head can be rotated relative to the enlarqement. The u er or concave face of the plate is preterprovided with a cushion 10 of leather or the like. A. longitudinal series of openings 11. is formed in each of the parallel members of the slide 6, as shown particularly in l. The base 2 of the standard is attached to the base 1 by means of rivets 12 or the like so that the standard is thus held fixed reiatire to the base 1.

A bolt 13 is extended transversely through the base portion 2 0% the standard and upwardly extending links 15 are pivotaliy mounted on this belt and extend aiong opposite sides oi the standard. The upper end portions of the'linlrs are pivotally connected, as by means of studs 16, to the sides o'i a lever 17 said lever straddling the standard and the slide and being" pivotaliy connected to the slide close to the enlargement 7. The free end portion of the lever is enlarged to form a loop 19 and said looped portion is referably offset, as indicated mi'ticularly m Fig. 2, so that, when the slit e 6 and the head 8 are elevated, the loop 19 is free to straddle one of the upwardly converging portions .3 of the standard while the remaining'. portions of the lever move into position between the links 15 and one of the arms 4. This is illustrated in Fig. 2. The lever 17 is preferably connected to the slide 6 by means of a pin 20 insertiblo through any of the openings 11. in the slide t) and said pinis prevented from being withdrawn fromthe o onings and the lever by a cotter pin 21 or he like engaging one end thereof.

It. will be apparent that, by oiiset-t-ing tho loopedportion 19 0t thelever, said lever-can be swung inwardly a ,sufiicient distance toward the standard to bring the pivots 16 past the vertical. line assing through the pin 20, and as shown in Fin". 2, when the. parts are thus positionedthe jack will support any weight which may be applied to ,thehead. 8 without danger of the lever 1? tit) ill)

means of this jack.

"swinging upwardly and permitting the slide 10 comes into contact. with the-part to be lifted." Pin 20 is then inserted throughlever 17 and through the opening 11 in alinement with the pin. After the pin has been secured by means of the cotter 21, the looped end 19' of the lever is pushed downwardly. Slide 6 will thus beforced upwardly and the head 8 will cause the part in the path thereof to be elevated. In moving the lever l7'downwardly to its greatest extent, the

ivots 16 are moved under the pin 20 and past the dead center so that the jack becomes self-locking and will support, the weight to which it. is subjected. without the use of any special locking means. To lower the head 8 and the parts supported thereby, it is merely necessary to swing the looped end 19 of the lever upwardly so as to bring the ,piv

ots 10 from under the pin :20 whereupon the weight of the object being. supported will cause the slide 6 to move downwardly and the lever 17 to swing upwardly.

It will be seen that the jack can be actuated pressinglever 17 downwardly with the foot and by pushing the lever upwardly in the same manner. As the head 8 is swiveled on the slide 6 and is arranged directly over it at all times, it will be seen that the jack can be placed so as to cause the lever to extend in any desired direction from under the part to be lifted so as thus to suit the convenience of the operator.

The arms 4 are prevented from spreading apart at their upper ends, by a tie 22 which extends through said arms adjacent their upper ends and also extends between the side members of the slide 6. This tie can be,

in the form of a rivet, bolt or the like. If desired. the base 1 may be formed at one end, with an angular wing or extension 23 inclined so as to fit snugly on one of the upwardly converging portions 3, said exten sion being riveted or otherwise fastcned t-o said portion. l urthermore, and as shown in Fig. 5, the members of the slide 6 are preterably slightly bowed transversely so as to fit snugly within the channeled members 4 and, furthermore to reinforce the slide 6.

Spacing washers 24- are preferably interposed between the lower ends of the links 153 and the base portion these washers being mounted on tbe'bolt 13.

The tie is preferably constructed as sin-rein it is shown as made late 25 from whiclnstuds up of a spa-ve 26 project-,these studs being fastened withinzthe members 4:.

Instead of providing a single wing or extension 23 on the base 1, two or more .exten sions may be employed.

It might be stated that the amount of leverage obtained by the use of this-jack can be varied by changing the relative positions of the pivot 16 and the pin 20, thus adapting "the jack to the load which it is expected to lift.

. It is to be understood that after the jack has once been adjusted for a certain vehicle it is not necessary to change the adjustmenti The quick action of the jack renders it espe cially desirable for use in suppo rtin' ve= hicles in order to relieve their tires. c e6ii= stunt weight while in storage.

That is claimed is:

1. A jack including a base, a standard thereon formed in. a single lengthof cban= neled material, said standard having up= standing spaced. portions with their chan nels-innermost, a slide formed'in'u single length of metal folded to form naval el spaced" members mounted'witbin the chan nels in said standard, a tie connecting the channeled members of the standard and extending between the members of the slide,

and means for shifting the slide longitudinally relative to the standard.

2. Afack including a base, a channeled strip secured on the baseand'. having upstanding portions forming a standard, the channel being formed in the inner faces of said portions, a tie connecting said portions, a slide mounted within the channels in the upstanding portions and consisting ofa single length of metal folded upon itself to form opposed parallel portions, the tie being extended between said parallel portions, and

-inean's for" shifting the slide longitudinally relative to the standard.

A jack including a" base, a channeled strip secured on the base and having a standing portions forming a standard, tie

aslide mounted within the channels in the upstanding portions and consisting of a single length of metal folded upon itself to form oppose'dparallelportions the tie bcing extendcd between said parallel port-ions, means for shifting the slide longitudinally rel'ative to the standard, a link pivotally connected to the lower portion of the standard, a lever pivotally connected to the slide, and a pivotal connection between the lover and link. I

4. A jack including a base, a channeled strip secured on the base andhaving upstanding port-ions forming a standard, the

.channel being formed in the inner faces of .Stlld 'DOI'UOUS, a tie connecting said port-ions,

channel being formed in the inner faces of i,

said portions. :1 tie connecting said portions, a. slide mounted within the channels in the the standard, a lever pivotally connected to the slide, and a pivotal connection between the lever and link, said connection being shiftable past the lever and slide to lock the slide in elevated position.

5. The combination with a base, of a standard formed in a single length of channeled material and including upwardly extending portions having the channel in the inner faces thereof and forming a guide, a slide Within said guide and formed in'a single length of metal folded on itself, a lever straddling the slide and standard and pivotally and adjustably connected to the slide, and links connecting said lever and the base portion of the standard, the points of connection between the links and the lever being shiftable past the dead center to lock the. slide in elevated position.-

, 6. A jack including a base, a longitudhnally channeled strip secured on the base and having upwardly converging portions merging into upwardly extending arms, the channel being formed in the inner faces of the arms, a tie connecting the arms, a slide interposed between and guided by the arms,

' enlargement, links pivotally connected to the lower portion of the standard, a lever pivotally and adjustably connected to the slide, and pivotal connections between the lever and the links, said last named connec tions being shiftable past the dead center to lock the slide in elevated position. 7. A jack including abase, a standard secured on the base and formed in a single length of channeled material, said standard having upstanding opposed portions with channels in their inner faces, a Wing upon the base and lapping and secured to one of said ,upstanding port-ions, spacing means neled material, said standard having cupstandingspaced portions with theirv chan nels innermost, a slide formed in single length of metal folded to form parallel spaced members mounted within the channels in said standard, said members being bowed transversely, a tie connecting the stituting spacing means, said tie extending between the members of the slide, and means for shifting the slide longitudinally relative to the standard.

channeled members of the standard and con- In testimony that I claim the foregoing as my own, I have hereto aiiixed my signature in the presence of two itnesses.

HERMAN W. LAMPMAN. Witnesses: 

